20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 357

• Manufacturer Part Number: 20-668-0024
• Description: IC CPU RABBIT4000 128-LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0024

• Processor Type: Rabbit 4000 8-bit
• Speed: 60MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: 20-668-0022; 316-1078

serial ports (continued)
slave port ....................... 77, 161
sleepy clock modes ............... 19
SMODE pin settings ............. 28
SPCR
specifications .................. 5, 301
Index
Serial Ports E – F ............ 145
addresses ......................... 161
block diagram ................. 162
bootstrap processor ......... 162
clocks .............................. 163
dependencies ................... 163
interrupts ......... 161, 163, 166
operation ......................... 164
overview .......................... 161
pin use ............................. 163
R/W timing ..................... 168
register descriptions ........ 170
registers ........................... 162
slave attention ................. 161
timing diagrams .............. 168
Parallel Port A setup ......... 73
AC characteristics ........... 303
BGA package .................. 324
asynchronous mode ..... 145
block diagram .............. 146
clocks .......................... 148
dependencies ............... 148
HDLC data encoding .. 152
HDLC mode ................ 145
interrupts ..................... 149
operation ...................... 150
overview ...................... 145
pin use ......................... 148
register descriptions .... 155
registers ....................... 147
SxSR ........................... 145
example ISR ................ 166
configurations .............. 167
connections .................. 165
master .......................... 165
master/slave communica-
slave ............................ 165
slave/master communica-
dimensions .................. 325
land pattern .................. 325
pinout .......................... 324
tion ............................ 166
tion ............................ 166
DPLL counter .......... 152
asynchronous mode . 150
HDLC mode ............ 150
specifications (continued)
spectrum spreader ............. 9, 13
stack protection ..................... 52
system management .............. 31
System/User mode .............. 283
clock speeds .................... 314
DC characteristics ........... 301
LQFP package ................. 321
memory access times 304, 311
package ........................... 321
power and current consump-
block diagram ................... 32
clocks ................................ 33
dependencies ..................... 33
interrupts ........................... 33
onchip-encryption RAM ... 31
operation
other registers .................... 31
periodic interrupt ............... 31
real-time clock .................. 31
register descriptions .......... 36
registers ............................. 32
watchdog timers ................ 31
dependencies ................... 285
differences between System
inaccessible addresses in User
interrupts ................. 286, 292
opcodes ........................... 290
operation ......................... 287
recommended clock/mem-
dimensions .................. 322
land pattern .................. 322
PC board layout ........... 323
pinout .......................... 321
external I/O reads ........ 308
external I/O writes ....... 309
memory reads .............. 304
memory writes ............ 305
battery-backed clock ... 319
sleep modes ................. 318
periodic interrupt ........... 34
real-time clock .............. 34
watchdog timer .............. 35
GCPU register ............... 31
GOCR register .............. 31
GREV register ............... 31
complete operating system
enabling ....................... 289
memory protection ...... 287
mixed operation .......... 288
tion .............................. 317
mode and User mode .. 283
mode ........................... 285
ory configurations .... 314
................................... 288
System/User mode (continued)
T
timers
timing diagrams
Timer A ........................... 107
Timer B ........................... 115
Timer C ........................... 121
I/O R/W cycles ............... 310
memory R/W cycles ....... 306
memory R/W cycles (early
slave port R/W cycles 168, 169
overview ......................... 283
register descriptions ........ 294
registers ........................... 284
use
memory protection ...... 287
block diagram .............. 109
capabilities .................. 108
clocks .......................... 110
dependencies ............... 110
interrupts ............. 108, 111
operation ..................... 111
overview ...................... 107
register descriptions .... 112
registers ....................... 110
reload register operation 107
block diagram .............. 115
clocks .......................... 116
dependencies ............... 116
interrupts ............. 116, 117
operation ..................... 117
overview ...................... 115
PWM operation ........... 115
register descriptions .... 118
registers ....................... 116
block diagram .............. 122
clocks .......................... 124
dependencies ............... 124
DMA control ............... 121
interrupts ............. 124, 125
operation ..................... 125
overview ...................... 121
register descriptions .... 126
registers ....................... 123
output enable and write
enable) ........................ 307
example ISR ............ 111
example ISR ............ 117
example ISR ............ 125
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